Can Strong Magnetic Fields Push White Dwarfs Beyond the Chandrasekhar Limit?

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In summary, the paper "New mass limit for white dwarfs: super-Chandrasekhar type Ia supernova as a new standard candle" discusses the possibility of white dwarfs reaching super-Chandrasekhar masses due to strong magnetic fields. This could potentially explain peculiar type Ia supernovae and raises concerns about the reliability of type Ia supernovae as standard candles at high redshifts. The conversation participants found the topic interesting and expressed curiosity about further developments.
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Chronos
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This paper, New mass limit for white dwarfs: super-Chandrasekhar type Ia supernova as a new standard candle, http://arxiv.org/abs/1301.5965, discusses the possibility of white dwarfs achieving super-Chandrasekhar masses due to strong magnetic fields. It is proposed as a candidate explanation for peculiar type Ia supernova. It implies type Ia supernova as standard candles may be of questionable reliability at high redshift, where spectroscopic distinction between normal and peculiar type Ia supernova is less easily achieved.
 
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  • #2
That's pretty cool.
 
  • #3
Very interesting. Thanks for posting. Be interesting to see what more comes from this.
 
  • #4
Good article thanks for posting it
 
  • #5


This paper presents an interesting and potentially groundbreaking theory regarding white dwarfs and their role in type Ia supernovae. The idea that strong magnetic fields could allow white dwarfs to reach super-Chandrasekhar masses is intriguing and could have significant implications for our understanding of these events.

If this theory is confirmed, it could challenge the reliability of type Ia supernovae as standard candles, particularly at high redshifts where it may be more difficult to distinguish between normal and peculiar type Ia supernovae through spectroscopic analysis. This could have an impact on our ability to accurately measure distances and cosmological parameters.

Further research and observations will be needed to fully explore and validate this hypothesis. If it is found to be true, it could open up new avenues for studying white dwarfs and their role in the universe. Overall, this paper presents a thought-provoking idea that warrants further investigation.
 

What are "Overly massive white dwarfs"?

Overly massive white dwarfs are a type of star that has reached the end of its life cycle and collapsed under its own gravity. They are composed of degenerate matter and have a mass that is greater than the Chandrasekhar limit, which is around 1.4 times the mass of our sun.

How are "Overly massive white dwarfs" formed?

"Overly massive white dwarfs are formed when a star with a mass between 8 and 10 times that of our sun runs out of fuel and undergoes a supernova explosion. The core of the star then collapses and becomes a white dwarf. If the white dwarf's mass exceeds the Chandrasekhar limit, it will continue to collapse and become an overly massive white dwarf."

What makes "Overly massive white dwarfs" unique?

One of the unique features of overly massive white dwarfs is their high gravitational pull. This can cause the star to collapse even further, potentially leading to the formation of a neutron star or black hole. Additionally, they have a higher surface gravity and a higher density compared to regular white dwarfs.

What are the implications of studying "Overly massive white dwarfs"?

Studying overly massive white dwarfs can provide valuable insights into the evolution of stars and the processes involved in the formation of different celestial objects. They also play a crucial role in the formation of Type Ia supernovae, which are used as standard candles in measuring distances in the universe.

Are there any known "Overly massive white dwarfs" in our galaxy?

Yes, there are a few known overly massive white dwarfs in our galaxy, such as Sirius B and Stein 2051 B. However, they are relatively rare compared to regular white dwarfs and are difficult to detect due to their small size and dimness.

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